Regulation 4 - Permeability
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Statutory Documents - IMO Publications and Documents - Resolutions - Assembly - IMO Resolution A.265(VIII) – Regulations on Subdivision and Stability of Passenger Ships as an Equivalent to Part B of Chapter II of the International Convention for the Safety of Life at Sea, 1960 – (Adopted on 20 November 1973) - Annex - Regulations on Subdivision and Stability of Passenger Ships as An Equivalent to Part B of Chapter II of the International Convention for the Safety of Life at Sea, 1960 - Regulation 4 - Permeability

Regulation 4 - Permeability

  (a) For the purpose of the subdivision and damage stability calculations of Regulations 5, 6 and 7 the permeability of each space or part of a space subject to flooding either during any intermediate stage or in the final stage of flooding shall be as follows:

Spaces Permeability (μ)
Appropriated as accommodation for passengers and crew, or other spaces not specifically herein designated 0.95
Appropriated for machinery 0.85
Normally occupied by stores 0.60
Intended for consumable liquids 0.00 or 0.95footnote

  (b) The permeability μ of any space appropriated for cargo shall be assumed to vary with the draught before damage in such a way that for any initial draught di the permeability μ i of any cargo space shall be taken as:

  • but not more than 0.95 nor less than 0.60.

  (c) If the ship's arrangement or service are such that the use of other permeabilities resulting in more severe requirements is logical the use of other permeabilities may be required by the Administration.

Parent topic: Annex - Regulations on Subdivision and Stability of Passenger Ships as An Equivalent to Part B of Chapter II of the International Convention for the Safety of Life at Sea, 1960
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